I searched to see if anyone had posted this before but it came up empty.
There is a chrome plugin I have been using for a few months now called Honey( ref- link(
joinhoney.com/ref/jxmyvv) Non ref-link
joinhoney.com) that automatically enters in coupon codes that are in their database and enters in the best one for you. They also have an area that works similar to ebates that gives you a portion of their affiliate commissions. How ever it does not tell your what percentage you will be getting so I still use ebates.
The best deal I have gotten with this was web hosting through Godaddy. My bill was supposed to be $100, they entered a code and dropped it down to $24 and I will be getting back 15% from ebates. Hope you enjoy it.
